I would like to see the Traction Control separated from the Stability control in the parts selection Menu. In my opinion, TC acts just too hard, but stability control is very handy when playing with a keyboard. As far as I know there is no way to turn TC off and keep ESC on. For the apps' placement I would like to be able to drag the apps and place them outside the game's window. It would be useful to prevent apps from blocking your view when you have a lot of them active.
Why would you want to move the apps out of the game window? Just use fullscreen instead if you need to see more...